fix stack_int_issorted

src/int_stack.c

@@ -49,6 +49,7 @@ int	stack_int_issorted(const t_stack *s)
 	{
 		if (prev > arr_int_get(view.raw, view.top))
 			return (0);
+		prev = arr_int_get(view.raw, view.top);
 	}
 	return (1);
 }